{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "import tkinter\n",
    "import tkinter.messagebox\n",
    "import os\n",
    "import os.path\n",
    "\n",
    "path = os.getenv('temp')\n",
    "filename = os.path.join(path, 'info.txt')\n",
    "\n",
    "#创建应用程序窗口\n",
    "root = tkinter.Tk()\n",
    "#定义窗口大小\n",
    "root['height'] =140\n",
    "root['width'] =200\n",
    "\n",
    "#在窗口上创建标签组件\n",
    "labeName = tkinter.Label(root,\n",
    "                             text='User Name:',\n",
    "                             justify=tkinter.RIGHT,\n",
    "                             anchor = 'e',\n",
    "                             width=80)\n",
    "#把组件放置到窗口上指定区域\n",
    "labeName.place(x=10,y=5,width=80,height=20)\n",
    "\n",
    "#创建字符串变量和文本框组件，同时设置关联的变量\n",
    "#可以通过关联变量来读取或修改文本框内的文本\n",
    "varName = tkinter.StringVar(root,value='')\n",
    "entryName = tkinter.Entry(root,\n",
    "                             width=80,\n",
    "                             textvariable=varName)\n",
    "entryName.place(x=100,y=5,width=80,height=20)\n",
    "\n",
    "labelPwd = tkinter.Label(root,\n",
    "                            text='User Pwd:',\n",
    "                            justify=tkinter.RIGHT,\n",
    "                            anchor = 'e',\n",
    "                            width=80)\n",
    "labelPwd.place(x=10,y=30,width=80,height=20)\n",
    "\n",
    "#创建密码文本框\n",
    "varPwd = tkinter.StringVar(root,value='')\n",
    "entryPwd = tkinter.Entry(root,\n",
    "                            show='*', #不管输入什么，都显示星号\n",
    "                            width=80,\n",
    "                            textvariable=varPwd)\n",
    "\n",
    "entryPwd.place(x=100,y=30,width=80,height=20)\n",
    "\n",
    "#尝试自动填写用户名和密码\n",
    "try:\n",
    "    with open(filename) as fp:\n",
    "        n, p = fp.read().split().split(',')\n",
    "        varName.set(n)\n",
    "        varPwd.set(p)\n",
    "except:\n",
    "    pass\n",
    "\n",
    "#记住我，复选框\n",
    "rememberMe = tkinter.IntVar(root,value=1)\n",
    "#选中时变量值为1，未选中时为0，默认选中\n",
    "checkRemember = tkinter.Checkbutton(root,\n",
    "                                        text='Remember me?',\n",
    "                                        variable=rememberMe,\n",
    "                                        onvalue=1,\n",
    "                                        offvalue=0)\n",
    "checkRemember.place(x=30, y=70, width=120, height=20)\n",
    "\n",
    "#登录按钮事件处理函数\n",
    "def login():\n",
    "    #获取用户名和密码\n",
    "    name = entryName.get()\n",
    "    pwd = entryPwd.get()\n",
    "    if name == 'admin' and pwd == '123456':\n",
    "        tkinter.messagebox.showinfo(title='恭喜',\n",
    "                                       message='登录成功！')\n",
    "        if rememberMe.get() == 1:\n",
    "            #把登陆成功的信号写入临时文件\n",
    "            with open(filename,'w') as fp:\n",
    "                fp.write(','. join((name,pwd)))\n",
    "    else:\n",
    "        try:\n",
    "            #删除用于记录用户名和密码的临时文件\n",
    "            os.remove(filename)\n",
    "        except:\n",
    "            pass \n",
    "        tkinter.messagebox.showerror('警告',\n",
    "                                       message='用户名或密码错误')\n",
    "#创建按钮组件，同时设置按钮事件处理函数\n",
    "buttonOk = tkinter.Button(root,\n",
    "                            text='Login',  #设置按钮上显示的文本\n",
    "                            command=login) #设置按钮的单机事件处理函数\n",
    "buttonOk.place(x=30,y=100,width=50,height=20)\n",
    "\n",
    "#取消按钮的事件处理函数\n",
    "def cancel():\n",
    "    #清空用户输入的用户名和密码\n",
    "    varName.set('')\n",
    "    varPwd.set('')\n",
    "buttonCancel = tkinter.Button(root,\n",
    "                                 text='Cancel',\n",
    "                                 command=cancel)\n",
    "buttonCancel.place(x=90,y=100,width=50,height=20)\n",
    "\n",
    "#启动消息循环\n",
    "root.mainloop()"
   ]
  }
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